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What are the 3 types of Blood Vessels?
arteries
veins
capillaries
Characteristics of the Arteries
carry oxygenated blood away from the heart
however pulmonary arteries carry deoxygenated blood from the heart to the lungs
Characteristics of the Veins
carry deoxygenated blood to the heart
however pulmonary veins carry oxygenated blood to the heart
Characteristics of the Capillaries
they have permeable 1 cell thick walls that allow the movement of oxygen, carbon dioxide, and nutrients by the process of diffusion
they can dilate (expand) when large amounts of oxygen are required
they can vasoconstrict (shrink) to redirect blood to area of need